Suction nozzle



March 18, 1941.

e. E. L'OFGREN ET AL 35,2 6

SUCTION NOZZLE Filed July 11, 1939 INVENTORS.

Patented Mar. 18, 1941 PATENT .oFFIc I SUCTION NOZZLE Gustaf Einar Lofgren,

Riverside, and Adrian E.

Ross, Stamford, Conn., asslgnors to Electrolux Corporation, New York, N. Y., a corporation of Delaware Application July 11, 1939, Serial No. 283,768

7 Claims.

Our invention relates to' suction nozzles and more particularly to a suction nozzle for use with a vacuum cleaner.

In cleaning in confined spaces and on curved and irregular surfaces, it is frequently necessary cleaning a. relatively small area.

In accordance with our invention, an improved suction nozzle is provided which will clean as efficiently when only a portion of the suction nozzle is used as when the whole nozzle is utili'zed.

What we consider to be novel and our invention may be better understood by reference to the following specification and appended claims when considered in connection with the accompanying drawing, in which- Fig. 1 is a top view of the improved nozzle;

Fig. 2 is a, sectional view taken along the line 2-2 of Fig. 1;

v Fig. 3 is a bottom view; and

Fig. 4 is a sectional view taken along the 4-4 of Fig. 1.

Referring to the drawing, I0 indicates a body member in the form of a stamping having a chamber II adapted to communicate with a source of suction through a connection member or sleeve I2. Sleeve I2 is secured within an open-- ing IS in the bodymember III as by means of welding. A base plate I4 is provided with a curved suction opening I5 communicating with chamber II through a passage I6. I4 is preferably formed of -a substantially rigid non-metallic material such as a phenolic con-' densation product but other material may be used. Around the periphery of plate l4, a smooth lip I1 is provided, arched transversely and forming a plane contact surface for base l4. Base I4 has a pointed end I8 where a passage I9 is pro- .vided in the lip II. An inner lip 20 extends around the suction opening I5 and is spaced inwardly from the plane of lip II, as best indicated in Figs. 2 and 4.

Body I0 and plate I4 are secured together by means of a strap 2I which is connected to sleeve I2 at one end by soldering or welding, and to the base H at the other end by a rivet 22. Strap 2| is seated in a recessed portion 23 in plate l4 so that no exposed portion of strap 2| will be in the path of air flow through chamber II which wcv'd produce turbulence, Engagement between strap 2| andshoulders 24 at the sides of recessed portion 23 prevents twisting of body member I 0 with respect to base I4. Positioning of the body member II! on base I4 is accomplished by the lolines Base plate cation of strap 2| in recessed portion 23 and by engagement of a flange 25 extending around the bottom edge of body ID with a shoulder 26 of base I4. Channels 2'! in plate I4 provide passages communicating with the atmosphere at the rear of base I4 and with the suction opening I5 across the lip 20. A central tongue 28 extends outwardly from the base I4 to a plane substan tially coincident with the plane of lip I1. Tongue 28 prevents lightmaterial, such as curtains, when being cleaned, from sealing across the lips l1 and 20 and closing the passages formed by the channels 21. The channels 21 are progressively reduced in cross-sectional area at their ends ad-' jacent passage I6, as best indicated inFig. 2, to more evenly distribute the air flow from channels 21 across lip 20. Also in Fig. 2 it may be noted that the thickness of the base I4 is reduced at 29 adjacent passage "5 to increase the crosssectional area of the air flow path at the point. where the walls or body l0 and base I4 converge to the pointed end I 8. g

A baliie plate 30 is secured to the inner eiid of sleeve I2 to prevent eddies between sleeve I2 and body III which tend to produce noise.

In use the nozzle is connected to a source of suction by insertim'a hose end or suction conduit in the sleeve I2. The force necessary to move the nozzle about on a. surface being cleaned is transmitted from the suction conduit by the sleeve I2 and strap 2| to the base I4.

In cleaning a relatively fiat surface, such as a rug or the seat of an upholstered chain-the whole area of the base is placed in contact with the surfacebeing cleaned. The nozzle may be moved forwardly and backwardly or from side to side or in any direction most convenient for cleaning the particular surface. By moving the nozzle from side to side, a larger area can be covered with a single stroke. In a confined space, such as the corner of an upholstered chair, in which the whole of the nozzle cannot be inserted, the pointed end I8 is inserted therein, and due to the concentration of the suction adjacent the pointed end by virtue of the proximity of v the passage I6, communicating with the chamber II, a very eflicient cleaning action is obtained.

) When' it is necessary to clean a curved or irregular surface which does not have any flat area sufficiently large for the whole of the base I4 to contact, the surface may be cleanedfsimply by placing the pointed end of the base I4 in contact with the surface to be cleaned. If the passage I6 were extended throughout the whole length of the suction ppening I5, there would'be 55 a great reduction in the suction due to the relatively free passage of the air into the uncovered portion of the suction opening l5. Thus, by this arrangement, it is possible to maintain the suction at a relatively high value without the necessity of placing the whole area of the base in contact with the surface being cleaned. The tongue 28 prevents any light fabric, such as a curtain or'port'ire, being drawn into the channels 21 and sealing directly across the lips l1 and 20.

This insures a free passage for the air from the rear of the base I through the passages formed by the channels 21 into the suction opening l5 across the inner lip 20. The passage IS in the lip H, at the pointed end l8, further'insures a highly efficient cleaning ability at the pointed end by permitting a large flow of air at this point which is particularly useful when working in small spaces. The baflle 30 prevents eddies being fr *med by the flow of the air through the chamber ll, across the sharp edges of the sleeve i2, which would produce considerable noise without performing any useful function.- Such eddies also tend to reduce the flow of air by interference therewith. By transmitting. the force for moving the nozzle from the sleeve l2 directly to the base I through the strap 2|, the body "I is relieved of all strain and may be formed ofrelatively thin gauge metal in any shape desired for the sake of appearance and convenience.

The assembly of the body l0 and base I4 is accomplished by positioning the body ID on the base I4 with the strap 2| located in the recessed portion 23 and flange v25 in engagement with shoulder 26 and inserting the rivet 22.

What we claim is:

1. A suction nozzle including a body member having a chamber, a connection member for said body member communicating with said chamber, a plate of substantially oval shape secured to said body member having a passage communicating with said chamber, a smooth lip extending outwardly from the periphery of said plate and forming a flat contact surface, a second smooth lip extending from said plate parallel to and defining with said first-named lip a suction opening communicating with said passage, and a channel in'said plate communicating with the atmosphere at one end of said plate and across said second lip with said passage at the other end.

2. A suction nozzle including a. body member having a central chamber, a connection member communicating with said chamber adapted for connection.v to a source of suction, a base of substantially-oval shape having-a curved suction opening adjacent the edge of the base communicating with said chamber through a passage in the base, a lip extending along the periphery of the base adjacent to said suction opening, a second lip extending along the inside of said suction opening, said base having a. passage communicating with the atmosphere at one end and across said last-mentioned lip with said firstnamed passage at the other end, and a centrally located tongue extending outwardly from. the base beyond said last-named lip.

3. A suction nozzle including a body member having a chamber, a sleeve secured to said body member adapted to receive asuction conduit and communicating with said chamber, a base plate of substantially oval shape secured to said body .wardly from said base plate and terminating ing a. flat contact surface, a second lip spaced inwardly from the plane of said first-named lip and defining therewith a suction opening communicating with said passage, said base having a channel communicating with the atmosphere at 5 the end of said base remote from said passage and with saidsuctlon opening across said last-named lip, and a tongue extending from said base plate spaced from said second lip and having a surface in the plane of the contact surface of said firstnamed lip.

4. A suction nozzle including a body member having a chamber, a sleeve secured to said body member communicating with said chamber, a strap connected to-said sleeve, a base plate secured to said strap having a passage communicating with said chamber, a lip extending outwardly along the periphery of said base plate forming a flat contact surface, an inner lip extending outshort of the plane of said outer lip, said base plate having a suction opening between said firstnamed lip and said inner lip communicating with said passage,'and a tongue extending from said base plate spacedfrom said inner lip having a contact surface in the plane of said first-named lip, said base plate having a channel communicating with the atmosphere at one end of the base plate remote from said passage and with said suction opening across said inner lip.

5. A suction nozzle including a hollow body member, a sleeve secured to said body member and communicating with the interior of the LJdy member, a flange extending outwardly around the periphery of the body member, a base plate having a recessed portion and a shoulder extending around its periphery, a strap connected to said sleeve and secured in said recessed portion of said base, said flange engaging said shoulder, a lip extending outwardly along the periphery of said base forming a flat contact surface, and an in-. ner lip spaced from said last-named lip defining therewith a suction opening, said base plate having a passage at one end communicating with said suction opening and the interior of said body 45 member, saidbase plate having a channel extending from the end remote from said last-named passage and communicating with said suction opening across said inner lip.

6.- a suction nozzle including a hollow body member, a sleeve secured to said body member and communicating with the interior of the body member, a flange extending outwardly around the periphery of the body member, a base plate having a recessed portion and ashoulder extending around its periphery, a strap connected to said sleeve and secured in said recessed portion of said base, said flange engaging said shoulder, a'lip extending'outwardly along the periphery of said base forming a flat contact surface, an inner lip spaced from said last-named lip defining therewith a suction opening, said, base plate having a passage at one end communicating with said suction opening and the interior of said body member, said base plate having a channel extending from the and remote from said lastnamed passage and communicating with said suction opening across said inner lip, and a tongue extending outwardly-from said base plate and po- 7 sitioned centrally thereof.

7. A suction nozzle including a body member having a central chamber, a sleeve extending within said body member and communicating with said central chamber, a baffle plate secured-7 to the inner end of said sleeve closing the space between said sleeve and said body member, a base plate having a recessed portion and a shoulder around its periphery, a strap connected to said sleeve and secured in said recessed portion of said base plate. a flange extending around the periphery of said body member and engaging the shoulder-of said 'pase plate, said base plate having a suction opening communicating through a passage at one end of said base plate'with the central chamber of said body .member,-a lip extend- 

